Javascript
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300行
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10.25 KB
function arrayExists(array, x) {
for (var i = 0; i < array.length; i++) {
if (array[i] == x) return true;
}
return false;
}
Date.prototype.formatDate = function (input,time) {
// formatDate :
// a PHP date like function, for formatting date strings
// See: http://www.php.net/date
//
// input : format string
// time : epoch time (seconds, and optional)
//
// if time is not passed, formatting is based on
// the current "this" date object's set time.
//
// supported:
// a, A, B, d, D, F, g, G, h, H, i, j, l (lowercase L), L,
// m, M, n, O, r, s, S, t, U, w, W, y, Y, z
//
// unsupported:
// I (capital i), T, Z
var switches = ["a", "A", "B", "d", "D", "F", "g", "G", "h", "H",
"i", "j", "l", "L", "m", "M", "n", "O", "r", "s",
"S", "t", "U", "w", "W", "y", "Y", "z"];
var daysLong = ["Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"];
var daysShort = ["Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", "Sat"];
var monthsShort = ["Jan", "Feb", "Mar", "Apr",
"May", "Jun", "Jul", "Aug", "Sep",
"Oct", "Nov", "Dec"];
var monthsLong = ["January", "February", "March", "April",
"May", "June", "July", "August", "September",
"October", "November", "December"];
var daysSuffix = ["st", "nd", "rd", "th", "th", "th", "th", // 1st - 7th
"th", "th", "th", "th", "th", "th", "th", // 8th - 14th
"th", "th", "th", "th", "th", "th", "st", // 15th - 21st
"nd", "rd", "th", "th", "th", "th", "th", // 22nd - 28th
"th", "th", "st"]; // 29th - 31st
function a() {
// Lowercase Ante meridiem and Post meridiem
return self.getHours() > 11? "pm" : "am";
}
function A() {
// Uppercase Ante meridiem and Post meridiem
return self.getHours() > 11? "PM" : "AM";
}
function B(){
// Swatch internet time. code simply grabbed from ppk,
// since I was feeling lazy:
// http://www.xs4all.nl/~ppk/js/beat.html
var off = (self.getTimezoneOffset() + 60)*60;
var theSeconds = (self.getHours() * 3600) +
(self.getMinutes() * 60) +
self.getSeconds() + off;
var beat = Math.floor(theSeconds/86.4);
if (beat > 1000) beat -= 1000;
if (beat < 0) beat += 1000;
if ((""+beat).length == 1) beat = "00"+beat;
if ((""+beat).length == 2) beat = "0"+beat;
return beat;
}
function d() {
// Day of the month, 2 digits with leading zeros
return new String(self.getDate()).length == 1?
"0"+self.getDate() : self.getDate();
}
function D() {
// A textual representation of a day, three letters
return daysShort[self.getDay()];
}
function F() {
// A full textual representation of a month
return monthsLong[self.getMonth()];
}
function g() {
// 12-hour format of an hour without leading zeros
return self.getHours() > 12? self.getHours()-12 : self.getHours();
}
function G() {
// 24-hour format of an hour without leading zeros
return self.getHours();
}
function h() {
// 12-hour format of an hour with leading zeros
if (self.getHours() > 12) {
var s = new String(self.getHours()-12);
return s.length == 1?
"0"+ (self.getHours()-12) : self.getHours()-12;
} else {
var s = new String(self.getHours());
return s.length == 1?
"0"+self.getHours() : self.getHours();
}
}
function H() {
// 24-hour format of an hour with leading zeros
return new String(self.getHours()).length == 1?
"0"+self.getHours() : self.getHours();
}
function i() {
// Minutes with leading zeros
return new String(self.getMinutes()).length == 1?
"0"+self.getMinutes() : self.getMinutes();
}
function j() {
// Day of the month without leading zeros
return self.getDate();
}
function l() {
// A full textual representation of the day of the week
return daysLong[self.getDay()];
}
function L() {
// leap year or not. 1 if leap year, 0 if not.
// the logic should match iso's 8601 standard.
var y_ = Y();
if (
(y_ % 4 == 0 && y_ % 100 != 0) ||
(y_ % 4 == 0 && y_ % 100 == 0 && y_ % 400 == 0)
) {
return 1;
} else {
return 0;
}
}
function m() {
// Numeric representation of a month, with leading zeros
return self.getMonth() < 9?
"0"+(self.getMonth()+1) :
self.getMonth()+1;
}
function M() {
// A short textual representation of a month, three letters
return monthsShort[self.getMonth()];
}
function n() {
// Numeric representation of a month, without leading zeros
return self.getMonth()+1;
}
function O() {
// Difference to Greenwich time (GMT) in hours
var os = Math.abs(self.getTimezoneOffset());
var h = ""+Math.floor(os/60);
var m = ""+(os%60);
h.length == 1? h = "0"+h:1;
m.length == 1? m = "0"+m:1;
return self.getTimezoneOffset() < 0 ? "+"+h+m : "-"+h+m;
}
function r() {
// RFC 822 formatted date
var r; // result
// Thu , 21 Dec 2000
r = D() + ", " + j() + " " + M() + " " + Y() +
// 16 : 01 : 07 +0200
" " + H() + ":" + i() + ":" + s() + " " + O();
return r;
}
function S() {
// English ordinal suffix for the day of the month, 2 characters
return daysSuffix[self.getDate()-1];
}
function s() {
// Seconds, with leading zeros
return new String(self.getSeconds()).length == 1?
"0"+self.getSeconds() : self.getSeconds();
}
function t() {
// thanks to Matt Bannon for some much needed code-fixes here!
var daysinmonths = [null,31,28,31,30,31,30,31,31,30,31,30,31];
if (L()==1 && n()==2) return 29; // leap day
return daysinmonths[n()];
}
function U() {
// Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
return Math.round(self.getTime()/1000);
}
function W() {
// Weeknumber, as per ISO specification:
// http://www.cl.cam.ac.uk/~mgk25/iso-time.html
// if the day is three days before newyears eve,
// there's a chance it's "week 1" of next year.
// here we check for that.
var beforeNY = 364+L() - z();
var afterNY = z();
var weekday = w()!=0?w()-1:6; // makes sunday (0), into 6.
if (beforeNY <= 2 && weekday <= 2-beforeNY) {
return 1;
}
// similarly, if the day is within threedays of newyears
// there's a chance it belongs in the old year.
var ny = new Date("January 1 " + Y() + " 00:00:00");
var nyDay = ny.getDay()!=0?ny.getDay()-1:6;
if (
(afterNY <= 2) &&
(nyDay >=4) &&
(afterNY >= (6-nyDay))
) {
// Since I'm not sure we can just always return 53,
// i call the function here again, using the last day
// of the previous year, as the date, and then just
// return that week.
var prevNY = new Date("December 31 " + (Y()-1) + " 00:00:00");
return prevNY.formatDate("W");
}
// week 1, is the week that has the first thursday in it.
// note that this value is not zero index.
if (nyDay <= 3) {
// first day of the year fell on a thursday, or earlier.
return 1 + Math.floor( ( z() + nyDay ) / 7 );
} else {
// first day of the year fell on a friday, or later.
return 1 + Math.floor( ( z() - ( 7 - nyDay ) ) / 7 );
}
}
function w() {
// Numeric representation of the day of the week
return self.getDay();
}
function Y() {
// A full numeric representation of a year, 4 digits
// we first check, if getFullYear is supported. if it
// is, we just use that. ppks code is nice, but wont
// work with dates outside 1900-2038, or something like that
if (self.getFullYear) {
var newDate = new Date("January 1 2001 00:00:00 +0000");
var x = newDate .getFullYear();
if (x == 2001) {
// i trust the method now
return self.getFullYear();
}
}
// else, do this:
// codes thanks to ppk:
// http://www.xs4all.nl/~ppk/js/introdate.html
var x = self.getYear();
var y = x % 100;
y += (y < 38) ? 2000 : 1900;
return y;
}
function y() {
// A two-digit representation of a year
var y = Y()+"";
return y.substring(y.length-2,y.length);
}
function z() {
// The day of the year, zero indexed! 0 through 366
var t = new Date("January 1 " + Y() + " 00:00:00");
var diff = self.getTime() - t.getTime();
return Math.floor(diff/1000/60/60/24);
}
var self = this;
if (time) {
// save time
var prevTime = self.getTime();
self.setTime(time);
}
var ia = input.split("");
var ij = 0;
while (ia[ij]) {
if (ia[ij] == "\\") {
// this is our way of allowing users to escape stuff
ia.splice(ij,1);
} else {
if (arrayExists(switches,ia[ij])) {
ia[ij] = eval(ia[ij] + "()");
}
}
ij++;
}
// reset time, back to what it was
if (prevTime) {
self.setTime(prevTime);
}
return ia.join("");
}
var date = new Date("1/1/2007 1:11:11");
for (i = 0; i < 500; ++i) {
var shortFormat = date.formatDate("Y-m-d");
var longFormat = date.formatDate("l, F d, Y g:i:s A");
date.setTime(date.getTime() + 84266956);
}